A record turntable is rotating at 33 rev/min. A watermelon seed is on the turntable 6.4...

A record turntable is rotating at 33 rev/min. A watermelon seed is on the turntable 6.4 cm from the axis of rotation. (a) Calculate the acceleration of the seed, assuming that it does not slip. (b) What is the minimum value of the coefficient of static friction between the seed and the turntable if the seed is not to slip? (c) Suppose that the turntable achieves its angular speed by starting from rest and undergoing a constant angular acceleration for 0.13 s. Calculate the minimum coefficient of static friction required for the seed not to slip during the acceleration period.

Expert Solution

milcah answered 2 years ago

A turntable rotating 33 rev/m slows to a stop in 10s. If the acceleration is constant,...

A turntable rotating 33 rev/m slows to a stop in 10s. If the acceleration is constant, the number of revolutions through which the turntable rotates in the 10 is? A. 7.8 B. 1.4 C. 12.2 D. 2.7 E 6.1

A watermelon seed has the following coordinates: x = -6.4 m, y = 5.0 m, and...

A watermelon seed has the following coordinates: x = -6.4 m, y = 5.0 m, and z = 0 m. Find its position vector as (a) a magnitude and (b) an angle relative to the positive direction of the x axis. If the seed is moved to the xyz coordinates (3.0 m, 0 m, 0 m), what is its displacement as (c) a magnitude and (d) an angle relative to the positive direction of the x axis? Put the angles...

A 25.25 kg child is riding a playground merry-go-round that is rotating at 35.5 rev/min. (A)...

A 25.25 kg child is riding a playground merry-go-round that is rotating at 35.5 rev/min. (A) What net force is acting on her if she is standing on the merry-go-round 1.4 m from its center in newtons? The net force in this situation is sometimes called "centripetal force". (B) What net force (in N) is acting on her if she is standing on an amusement park merry-go-round that rotates at 3.2 rpm and she is 7.6 m from its center?...

A wheel is rotating freely at angular speed 530 rev/min on a shaft whose rotational inertia...

A wheel is rotating freely at angular speed 530 rev/min on a shaft whose rotational inertia is negligible. A second wheel, initially at rest and with 5 times the rotational inertia of the first, is suddenly coupled to the same shaft. (a) What is the angular speed of the resultant combination of the shaft and two wheels? (b) What fraction of the original rotational kinetic energy is lost?

The spin cycles of a washing machine have two angular speeds, 416 rev/min and 632 rev/min...

The spin cycles of a washing machine have two angular speeds, 416 rev/min and 632 rev/min . The internal diameter of the drum is 0.560 m Part A What is the ratio of the maximum radial force on the laundry for the higher angular speed to that for the lower speed? (F higher/F lower)=? Part B What is the ratio of the maximum tangential speed of the laundry for the higher angular speed to that for the lower speed? (V...

An electric turntable 0.780 mm in diameter is rotating about a fixed axis with an initial...

An electric turntable 0.780 mm in diameter is rotating about a fixed axis with an initial angular velocity of 0.270 rev/s and a constant angular acceleration of 0.885 rev/s^2. A) Compute the angular velocity of the turntable after 0.197 s. B) Through how many revolutions has the turntable spun in this time interval? C) What is the tangential speed of a point on the rim of the turntable at t = 0.197 s? D) What is the magnitude of the...

A coin is placed 18.0 cm from the axis of a rotating turntable of variable speed....

A coin is placed 18.0 cm from the axis of a rotating turntable of variable speed. When the speed of the turntable is slowly increased, the coin remains fixed on the turntable until a rate of 35.0 rp (revolutions per minute) is reached, at which point the coin slides off. Part A- What is the coefficient of static friction between the coin and the turntable? Express your answer using three significant figures.

A wind turbine is rotating counterclockwise at 0.6 rev/s and slows to a stop in 12...

A wind turbine is rotating counterclockwise at 0.6 rev/s and slows to a stop in 12 s. Its blades are 23 m in length. (a) What is the angular acceleration of the turbine? (b) What is the centripetal acceleration of the tip of the blades at t = 0 s? (c) What is the magnitude and direction of the total linear acceleration of the tip of the blades at t = 0 s?

A flat coil enclosing an area of 0.07m2 is rotating at 65 rev/s, with its axis...

A flat coil enclosing an area of 0.07m2 is rotating at 65 rev/s, with its axis of rotation perpendicular to a 0.23 T magnetic field. (a) If there are 996 turns on the coil, what is the maximum voltage induced in the coil? V (b) When the maximum induced voltage occurs, what is the orientation of the coil with respect to the magnetic field? The plane of the coil is perpendicular to the magnetic field. The plane of the coil...

A cooling fan is turned off when it is running at 840 rev/min . It turns...

A cooling fan is turned off when it is running at 840 rev/min . It turns 1400 revolutions before it comes to a stop. Part A:What was the fan's angular acceleration, assumed constant? Part B: How long did it take the fan to come to a complete stop? Please show step by step

Question